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7u83 2024-05-18 02:11:47 +02:00
parent 6ca5f28555
commit 28a6ccc3ee
1 changed files with 25 additions and 5 deletions
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28
uart_init.c
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@ -5,6 +5,14 @@
void uart_init(long fosc, long baud) void uart_init(long fosc, long baud)
{ {
TMOD = 0x20; // Timer 1 in Mode 2
TH1 = 0xFD; // 9600 baud rate
TL1 = 0xFD; // Initial value (not necessary)
TR1 = 1; // Start Timer 1
SCON = 0x50; // 8-bit data, 1 stop bit, REN enabled
return;
TMOD = 0; /* Timer 1, 8-bit auto reload mode */ TMOD = 0; /* Timer 1, 8-bit auto reload mode */
// P_SW1 |= (1 << 6); // move UART1 pins -> P3_6:rxd, P3_7:txd // P_SW1 |= (1 << 6); // move UART1 pins -> P3_6:rxd, P3_7:txd
@ -14,14 +22,26 @@ void uart_init(long fosc, long baud)
SM0 = 0; SM0 = 0;
SM1 = 1; // serial mode 1: 8-bit async SM1 = 1; // serial mode 1: 8-bit async
AUXR |= 0x14; // T2R: run T2, T2x12: T2 clk src sysclk/1 // AUXR |= 0x14; // T2R: run T2, T2x12: T2 clk src sysclk/1
AUXR |= 0x01; // S1ST2: T2 is baudrate generator // AUXR |= 0x01; // S1ST2: T2 is baudrate generator
SCON = 0x50; SCON = 0x50;
/* ES = 1; // enable uart1 interrupt TMOD |= T1_M1;
TI=1;
TCLK=0;
RCLK=0;
// TBCK=0;
// RBCK=0;
//
TH1=0xFD;
//SMOD0=0;
ES = 1; // enable uart1 interrupt
EA = 1; // enable interrupts EA = 1; // enable interrupts
REN = 1; REN = 1;
*/
} }